Using Evo Pistons

[DeNoZZo]

I am doing a stock rebuild. I have everything ready to assemble the shortblock, and I'm reusing my stock pistons that have been cleaned along with the stock rods. I had the crank cleaned and polished. I plan on eventually getting a 16g and am hoping for around 300-325 horse when I'm all done. Now today I was sitting there looking at my pistons and rods thinking- these have 150k miles on them.... They did clean up pretty well and the machinist said they all checked out. Now keep in mind this is an extreme budget rebuild. Should I break down and use Evo pistons as a cheap alternative, or just use the money in some other area. What exactly needs to be done to make them work? What rods can be used? Will they work with my standard size bearings I already bought (main and rod)? Will the oem 2g piston rings work (I already bought them and ringed my old ones)?

 

[whe3ls]

if you are using evo 9 piston youll need to use the customs rings that the dsm grave yard sells. you can use your 7 bolt rods or you can use 6 bolt rods and have them machined to fit

 

[TofastForU_99]

evo pistons are a great alternative. they are not expensive and they are rated to hold a good amount of HP. check this vendor there building me the same setup.

DSM Graveyard - Your #1 Source for DSM Parts!

 

[DeNoZZo]

What are the stock pistons/rods with 150k miles on them good for?

 

[TofastForU_99]

well there 2g rods so there not the strongest. and you never really want to use pistons over again in a rebuild depending on what the scoring looks like on the skirts and cylinder walls. if you have gone this far then you minus well do it the right way and then you wont have to worry about it again.
1g Rods
evo pistons and rings
block bored .020 over
block decked if needed and new freeze plugs put in
and then just put it back together

evo pistons are a good upgrade and have a good compression ratio at 8.8 to 1 compared to the stock compression on a 2g piston at 7.8 to 1

so for a little extra money you could have a very strong nice setup

 

[whe3ls]

2g pistons are 8.5:1 1g pistons are 7.8:1. unsure what the rod and pistons would be worth,

 

[DeNoZZo]

well there 2g rods so there not the strongest. and you never really want to use pistons over again in a rebuild depending on what the scoring looks like on the skirts and cylinder walls. if you have gone this far then you minus well do it the right way and then you wont have to worry about it again.
1g Rods
evo pistons and rings
block bored .020 over
block decked if needed and new freeze plugs put in
and then just put it back together

evo pistons are a good upgrade and have a good compression ratio at 8.8 to 1 compared to the stock compression on a 2g piston at 7.8 to 1

so for a little extra money you could have a very strong nice setup

Only problem is I've already had all the stuff done at the machine shop. I just had the cylinders honed, and a bunch of other stuff too. But no boring or decking the block. Only decked the head a little. 1g rods require machining to fit, and evo pistons and rings all together would be around 400 bucks i think. And just putting it back together... no... My rebuild is using almost all new parts other than the shortblock. And that shit is what really adds up. So far I've spent over 1300 and I still don't have enough parts to get the head back on. The old pistons and rods were in fine condition. But how far hp wise can I take them at that many miles?

 

[samvdb89]

Hey, I'm actually doing this build right now! It sounded really cool too start with, and still is cool, but the idea of it being cheap hasn't really worked out.. if i had it to do over again i probably would've just bought wiseco pistons... But if you want to go this route..

You need to have your rods machined to accept the Evo IX pins.
And make sure your shop puts the pistons on the rods the correct way.

This is a fun build in my opinion, i probably would've liked it better if i didn't run into a bunch of problems (not related to the pistons).

Don't forget to add the $50 per rod to have it machined and the shipping cost of the pistons and rings you should take into consideration when making your decision.

 

[whe3ls]

50 bucks per rod. holy crap. that's a total rip for narrowing and reaming of out the small end.

 

[Black95awd]

The evo rods will hold just fine. I have seen several 450-500 hp evo's on stock bottom ends. You will need to turn the piston around on the rod and that should be $20-40 per rod depending on your machine shop.

 

[projecteclipse2]

I actually just got some evo 9 pistons and rods in the mail today for like 160 bucks and they only had a few thousand miles on them them.
I would recommend them I mean I bought brand new oem pistons for 220 and sent them back and bought these.

 

[DeNoZZo]

I actually just got some evo 8 pistons and rods in the mail today for like 160 bucks and they only had a few thousand miles on them them.
I would recommend them I mean I bought brand new oem pistons for 220 and sent them back and bought these.

Where do you find deals like that? If I could get them that cheap I would probably do it.

 

[projecteclipse2]

My buddy sold them to me and he got them off ebay.

 

[DSM_PWR]

I plan on doing the EVO 9 Piston/1g Rod combo in my 1g soon, should make for some good power without the hassle of aftermarket parts...

I like the fact that Evo pistons have higher compression that 2g rods, but also that they are lighter

if you are using evo 9 piston youll need to use the customs rings that the dsm grave yard sells.......

Why is that?

 

[Boost_Addict_88]

This sounds like something I could do on my build. A cheaper alternative to forged internals and holds up to 500hp. Sorry for tha noob question, but what is tha difference between Evo 8 and 9 pistons?

 

[DSM_PWR]

Evo 8
Is made out of cast like our pistons

Evo 9
Are forged pistons... have piston side skirt coatings... lighter

Both have the same compression ratio

 

[projecteclipse2]

a member just told me i have evo 9 pistons im kind of syched not to jack his thread but how much power can they handle?

 

[DSM_PWR]

Its hard to say what kind of power because of the fact that most evo's dont break pistons, the rods will go out and none of them run OEM Pistons w/aftermarket rods..

I wouldn't really push them past 500whp but im sure some would say 500-600whp

 

[DeNoZZo]

Its hard to say what kind of power because of the fact that most evo's dont break pistons, the rods will go out and none of them run OEM Pistons w/aftermarket rods..

I wouldn't really push them past 500whp but im sure some would say 500-600whp

I've heard that.... But as they always say, it's all in the tune.

 

[DeNoZZo]

So let me get this straight- Evo 9 pistons AND rods are pretty much a drop in upgrade. Just face the markings on the pistons towards the timing belt. Correct? If not, what needs to be done for Evo 9 Pistons/Rods to fit? If I already have std size bearings for my stock 2g rods, will they work with the evo rods?

 

[DSMunknown]

Y'all might wanna take a gander through the thread below.


http://www.dsmtuners.com/forums/newbie-forum/311850-any-2gs-evo-pistons.html

 

[Boost_Addict_88]

I was looking to do this with my 1G. I'm planning a 6b block/7b head combo. I've heard a lot of good things about 1G rods, but my question is which are better: 1G rods or Evo 8/9 rods? My apologies for thread jacking.

 

[VTEC KILLR]

Yep I am in the middle of a rebuild and just got some evo 8 pistons, but after reading that link from DSMunknown(and the price of new rings) i am leaning toward a different setup.